Late 2013 Mac Pro CPU is socketed and can be upgraded. (See Step-by-Step Video on How to upgrade the CPU in a 2013 Mac Pro.) Also list of Apple guides on Installing/removing SSD and Memory, Using Multiple Displays, Info on Ports/Connectors, Audio Tips/Troubleshooting, Power Usage, Bootcamp/Windows Installs with troubleshooting info and SSD upgrades to 4TB.

More reports of 2009 Mac Pro very high Northbridge Temperatures due to a broken plastic heatsink retainer. (This can result in kernel panics/crashes.) If you can't find a source for the OEM retainer, some have used screws instead. (Linked page includes photo of Heatsink location and link to freeware temperature monitor.) Also check Mac Pro 2010 to 2012 models (same design).

(Nov 2011) Yet another report on a low-cost Dual Quad-Core CPU Upgrade to a 1st gen Mac Pro. Upgraded from the original two 2.66GHz Dual-Core CPUs to dual Xeon X5355 2.66GHz Quad-Cores. ($350 paid for the Quad-Core CPUs at auction.)

(Oct 2011) Hopefully a fix for this issue noted here on Oct. 13th. I wrote a reader with an affected MacBook Pro that had commented on the problem here on Oct. 14th to ask if the update solved the problem on his machine.

(Sept 2011) Article on a reader's upgrades to his MacBook Pro 2,2 including swapping in a Dual-Band (5GHz and 2.4GHz) Airport card with Airdrop Support, SSD drive and Thermal Paste to lower chipset temperatures.

(Sept 2011) Reports that -some- Mac Pro 1,1 owners that upgraded to Quad-Core CPUs had Kernel Panics in Lion (and in some cases 10.6.8). For those that did, using the 'unofficial' Mac Pro 1,1 to 2,1 EFI updater solved that they said. (Updated w/later notes.)

(May 2011) Notes and Tips regarding the "unofficial" EFI/BootRom updater for 2009 Mac Pros to flash a 2010 Mac Pros Bootrom. This enables support for 6-core CPUs and 1333MHz Memory. (Also reported to enable MiniDisplayPort Audio.) See notes in the post on tips and a FYI for 2009 Mac Pro owners that have "B08" bootrom.

(Sept 2010) iMac (intel-based) notes and pictures on swapping out the Airport card with the same 2-port SATA card for eSATA used earlier by Mini owners. (See article link below.)
(An earlier article on this mod is here.)

(Updated w/Apple fix for 10.6 in 2010) After some Apple forum thread/user concerns over higher than expected core temperatures with 2009 Mac Pros from simply playing audio in iTunes, I ran some simple tests in OS X vs Windows using freeware utilities for both OS's. Includes notes on Turbo mode, explanations from the author of OS X freeware Temperature monitor, notes on (turbo) core speeds reported in Windows and more.

(Nov 2009) A reader sent his Mac Pro FB-Dimm Pairing Tests w/mixed 1GB, 2GB and 4GB pairs, noting the 4GB pair were not fully recognized if the OEM (Apple supplied) Hynix 1GB FBdimms were installed in the same riser, despite Apple's guide showing that pairing is OK. (Many times over the years I've had Mac Pro owners write their new FBDimms were not recognized properly. Other than some rare cases of bad FB-dimms, usually the problem was the FB-Dimms were not Paired properly (1st thing to check) and/or not fully seated (dimm or riser card). I've included links to Apple's PDF guides on memory and riser cards on the linked page.)

(Last Update Dec 2012) Article from July 2008 (updated 100+ times) on the issue of flawed (packaging defect) Nvidia GPUs- including the 8600M used in many MacBook Pros. Updated to include Apple's later doc on the issue that noted affected MacBook Pro model production ranges and a warranty extension. Also includes reader reports, links to info on the issue, actions by other notebook mfrs and more.

Apple doesn't support running Classic on Intel Macs, but since early in 2006 there's been a build of "Sheep Shaver" for Intel Macs to run Classic, with some limitations. (See the page for more info, download links, tips, guides, etc.)

User reports from owners of the first model MacBook Pro, including installing Windows XP (natively), performance, usage, some OOB Problems and a section of related articles including take-apart guides and reviews.

(Jun 2010) The June 17th, 2010 news page had some comments on special drive cables/thermal sensors in the new 2010 Mac Minis (and reminders on HD brand specific/temp sensor cables for late 09 iMacs). The takeaparts of the new 2010 Minis didn't include any info on that (but I suspect may be revised later). However a reader with a 2010 Mini server sent notes/pix on the cables/termal sensors during his dual SSD upgrade/drive swap.

Photos/Info and reports on swapping out the Mini-PCIe Airport card with a 2-port SATA card used for eSATA. Includes card info and some initial real-world benchmarks. Reports are from OS X 10.6.4 and 10.5.8 mini users.
(NOTE: 2009 and Later Minis DO NOT have a Mini-PCIe Airport card and can't use this mod.)

Reader reports on some liquid cooled G5 towers leaking coolant (usually out of warranty). If not detected early the coolant leak can do substantial damage (blown PS, etc.) Includes reports from some owners that got repairs covered out of warranty and in some cases a new Mac Pro (where repair parts could not be procured). Also includes some DIY repairs some have done and photos of the 2 LCS designs.